EcoFlow DELTA 2 User Manual

Disclaimer

Read this user manual carefully before using the product to ensure that you completely understand the product and can correctly use it. After reading this user manual, keep it properly for future reference. Improper use of this product may cause serious injury to yourself or others, or cause product damage and property loss. Once you use this product, it is deemed that you understand, approve and accept all the terms and content in this document. EcoFlow is not liable for any loss caused by the user's failure to use this product in compliance with this user manual.

In compliance with laws and regulations, EcoFlow reserves the right to final interpretation of this document and all documents related to this product. This document is subject to changes (updates, revisions, or termination) without prior notice. Please visit EcoFlow's official website to obtain the latest product information.

Content Overview

• Specifications
• Safety Instructions
• EcoFlow App
• What's in the Box
• Product Details
• Power On/Off
• Charge Your Devices
• Charge DELTA 2
• Smart Extra Battery
• Smart Generator
• X-Boost and EPS
• FAQ
• Storage and Maintenance
• Troubleshooting
• FCC Warning & IC Warning

Specifications

General Info

Output Ports

Input Ports

Battery Info

Environmental Operating Temperatures

Add-ons (sold separately)

Note: The car outlet shares power with the DC5521 output port, offering a maximum output of 126W. Whether the product can be charged or discharged depends on the actual temperature of the battery pack.

Safety Instructions

Usage

1. Do not use the product near a heat source, such as a fire source or a heating furnace.
2. Avoid contact with any liquid. Do not immerse the product in water or get it wet. Do not use the product in the rain or humid environments.
3. Do not use the product in an environment with strong static electricity/magnetic fields.
4. Do not disassemble the product in any way or pierce the product with sharp objects.
5. Avoid using wires or metal objects that may result in a short circuit.
6. Do not use unofficial components or accessories. If you need to replace any components or accessories, please visit official EcoFlow channels to check relevant information.
7. When using the product, please strictly follow the operating temperatures specified in this user manual. If the temperature is too high, it may result in a fire or explosion; if the temperature is too low, the product performance may be severely reduced, or the product may cease to work.
8. Do not stack any heavy objects on the product.
9. Do not forcibly lock the fan during use.
10. Please avoid impact, falls, or severe vibrations when using the product. In case of a severe external impact, turn off the power supply immediately and stop using the product. Ensure the product is well fastened during transportation to avoid vibrations and impacts.
11. If you accidentally drop the product into water during use, please place it in a safe open area, and stay away from it until it is completely dry. The dried product should not be used again, and should be properly disposed of according to section "Disposal Guide". If the product catches fire, use fire extinguishers in the following order: water or water mist, sand, fire blanket, dry powder, and finally a carbon dioxide fire extinguisher.
12. Use a dry cloth to clean off dirt from the product ports.
13. Put the product on a flat surface to avoid damages caused by the product falling over. If the product is overturned and severely damaged, turn it off immediately, place the battery in an open area, keep it away from combustible matter and people, and dispose of it in accordance with local laws and regulations.
14. Ensure that the product is kept out of reach of children and pets.
15. Store the product in a dry and ventilated place.
16. We recommend using moisture barrier bags in wet environments (e.g., places by the sea or waterways) to prevent the product from getting soaked. If water is found inside the product, it must not be used or turned on again. Please take anti-electric shock measures before touching the product. Place the product in a safe, waterproof and open area. Contact EcoFlow Customer Service immediately.
17. This product is not recommended for powering medical emergency equipment related to personal safety, including but not limited to medical grade ventilators (hospital version CPAP: Continuous Positive Airway Pressure), artificial lungs (ECMO, Extracorporeal Membrane). Please follow your doctor's instructions and consult the manufacturer for restrictions on use. If used for general medical equipment, monitor power status to ensure power does not run out.
18. When in use, power supply products generate electromagnetic fields, which may affect the normal operation of medical implants or personal medical equipment such as pacemakers, cochlear implants, hearing aids, defibrillators etc. If such equipment is being used, contact the manufacturer to inquire about any restrictions on its use. Ensure a safe distance between medical implants and this product while in use.
19. When the power supply is connected in normal mode to a refrigerator, power fluctuations may cause it to automatically shut down. When connecting to a refrigerator storing medicine, vaccines, or other valuable items, set the AC output to "Always on" in the app. This supports a continuous power supply and ensures safe and efficient power consumption.

Note: Operation of this equipment in a residential environment could cause radio interference.

Disposal Guide

1. If conditions permit, fully discharge the battery before disposing it in a designated battery recycling bin. The product contains batteries with potentially dangerous chemicals, and disposal in ordinary trash cans is strictly prohibited. Follow local laws and regulations on battery recycling and disposal.
2. If the battery cannot be fully discharged due to a product failure, do not dispose of it directly in the battery recycling box. Contact a professional battery recycling company for further processing.
3. Please dispose of over-discharged batteries that cannot be recharged.

EcoFlow App

Control, monitor and customize your EcoFlow DELTA 2 from afar with the EcoFlow App.

Download here: https://download.ecoflow.com/app

Privacy Policy

By using EcoFlow Products, Applications and Services, you consent to the EcoFlow Term of Use and Privacy Policy, which you can access via the "About" section of the "User" page on the EcoFlow App or on the official EcoFlow website at:

https://www.ecoflow.com/policy/terms-of-use

https://www.ecoflow.com/policy/privacy-policy

What's in the Box

• DELTA 2
• AC Charging Cable
• Car Charging Cable
• DC5521 to DC5525 Cable
• User Manual & Warranty Card

Product Details

Overview

Front View:

• 1. LCD screen
• 2. Bluetooth pairing indicator
• 3. USB-A output ports
• 4. USB-C output ports
• 5. Main power button
• 6. USB-A fast charging output ports
• 7. USB power button
• 8. Solar/car charging input port
• 9. X-Stream charging input port
• 10. AC power button
• 11. DC5521 output ports
• 12. Car outlet
• 13. Overload protection switch
• 14. AC output sockets
• 15. 12V DC power button

Rear View:

• 1. Ventilation Fan
• 2. Extra Battery Port

Note: The type of AC socket varies in different countries or regions; the picture is for illustration only, please refer to the actual product.

LCD Screen

The LCD screen displays the following information:

• 1. Remaining battery percentage
• 2. Battery level indicator
• 3. Remaining charging/discharging time
• 4. Extra battery indicator
• 5. AC output indicator
• 6. USB-A output indicator
• 7. Battery failure warning
• 8. High temperature warning
• 9. Low temperature warning
• 10. Fan indicator
• 11. Input power
• 12. Output power
• 13. Overload warning
• 14. State of charge indicator
• 15. Wi-Fi status indicator
• 16. 12V DC output indicator
• 17. USB-C output indicator

Icon States:

• Remaining battery: Charging: Rotating clockwise; Fully charged: 100%; Flat battery: Flashing
• Wi-Fi: Solid: Internet connection succeeded; Off: Internet connection failed

Refer to "Troubleshooting" for details.

Power On/Off

Press the main power button once to turn on the product. The LCD screen lights up and the battery level indicator icon appears. Press and hold the main power button for at least 3 seconds to turn off the product.

LCD Screen Behavior:

• After the main power is turned on, press the main power button once to turn off the LCD screen.
• If the product is not used for 5 minutes, it enters sleep mode with the LCD screen off. The LCD screen turns on automatically when the product is used again.
• The product defaults to 2 hours of standby time. If output power buttons are turned off and there is no load for 2 hours, the product shuts off automatically. Standby duration can be set in the app.

Charging Your Devices

After the product is turned on, press the “USB power button”, “12V DC power button”, or “AC power button” to turn on their corresponding ports or sockets. Press again to turn them off.

Important Notes:

• Ensure the total power of all loaded devices is lower than the rated power.
• After the USB power button is turned on, the product will not shut off automatically.
• After the 12V DC output power button is turned on, the product will not shut off automatically.
• After 12 hours without any load for the AC output ports, the AC power button will shut down automatically.

Charging DELTA 2

AC Charging

EcoFlow's X-Stream fast charging technology is designed for AC charging. The AC charging speed can be adjusted via the EcoFlow app. In case of unusual situations where the AC input current exceeds 20A, the X-Stream charging input port initiates a self-protection function, and the Overload Protection Switch pops up. After confirming no product failure, press the switch to resume charging.

Indicator: Fully charged in approximately 1.2 hours.

Connection: Connect the AC charging cable to the AC input port.

Solar Charging

Connect solar panels to recharge the product. A solar charging cable (MC4-XT60 adapter cable) and the solar panel are supplied separately.

Instructions:

• When using an EcoFlow solar panel, follow the instructions provided with the solar panel.
• Ensure the solar panel's output voltage is within 60V to avoid product damage.

Car Charging

Use the car charger after the vehicle is started to avoid failure due to insufficient car battery. Ensure the cigarette lighter of the Car Outlet and the Car Charger Input Cable are in good condition. EcoFlow is not responsible for losses or damages caused by failure to follow instructions.

Connection: Connect the car charger cable to the car outlet.

Smart Extra Battery

A single DELTA 2 can connect up to 1 Smart Extra Battery for additional capacity. Refer to the user manuals of the DELTA 2 Smart Extra Battery and Smart Generator for detailed instructions.

Important Notes:

• Turn off both the Smart Extra Battery and DELTA 2 before connecting or disconnecting them.
• Before use, ensure both DELTA 2 and Smart Extra Battery display the extra battery icon on their screens.
• Do not connect or remove the Smart Extra Battery during charging and discharging processes. If necessary, turn off the product first.
• Do not touch the metal terminals of the Smart Extra Battery connector. Clean terminals gently with a dry cloth.

Smart Generator

Recharge DELTA 2 with the Smart Generator. Refer to the Smart Generator manual for more information.

X-Boost and EPS

X-Boost

To avoid operation failure due to overload protection, X-Boost automatically enables when total output exceeds rated power, allowing the product to power high-wattage appliances.

• X-Boost is not available when AC output is recharging (bypass mode).
• X-Boost is enabled by default; adjust in the EcoFlow App.
• X-Boost is not compatible with all appliances, especially those with strict voltage requirements or voltage protection (e.g., precise instruments). It is more suitable for heating devices. Conduct your own tests.

Bypass Mode: When the product is plugged in for recharging and connected to other devices, if the AC power button is on, devices are powered by the grid, not the power station.

EPS (Emergency Power Supply)

The product supports EPS. Connecting grid power to the AC Input Port via an AC cable allows powering devices through the AC Output Port (grid power is used). In case of a blackout, the product switches to battery power within 30ms.

Note: This is a basic UPS function and does not support 0ms switching. Do not connect devices requiring 0ms UPS (e.g., data servers, workstations). Test compatibility before use. It is recommended to charge one device at a time to avoid overload protection.

FAQ

1. What battery does the product use? High-quality LFP battery.
2. What devices can the product's AC output port power? It can power most household appliances. Confirm appliance power and ensure the total power of loaded appliances is lower than the rated power.
3. How long can the product charge my devices? The charging time is shown on the LCD Screen and can estimate charging time for appliances with stable power usage.
4. How do I know if the product is charging? The remaining charging time is shown on the LCD Screen. The charging indicator icon rotates with the remaining battery percentage and input power.
5. How do I clean the product? Gently wipe with a dry, soft, clean cloth or paper towel.
6. How do I store the product? Turn off the product, store in a dry, ventilated place at room temperature, away from water sources. For long-term storage, discharge and recharge every three months to extend battery life.
7. Can I bring the product on a plane? No.

Storage and Maintenance

1. Use and store the product in a place between 20°C - 30°C (68°F - 86°F), away from water, intense heat, and sharp objects. For extended lifespan, avoid places above 45°C (113°F) or below -10°C (14°F).
2. For long-term storage, discharge the product every three months (discharge to 0%, fully recharge, then discharge to 60%). The warranty is void if not charged or discharged for over 6 months.

Troubleshooting

Note: If an Alarm Prompt shows on the product LCD screen during use and does not disappear after a restart, stop using it immediately (do not try to charge or discharge). For assistance, contact EcoFlow Customer Service.

Regulatory Warnings

FCC Warning

This device complies with part 15 of the FCC Rules. Operation is subject to two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20cm between the radiator and your body.

IC Warning

This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.

This Class B digital apparatus complies with Canadian ICES-003. Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.

IC RF Statement: When using the product, maintain a distance of 20cm from the body to ensure compliance with RF exposure requirements.